Oops sorry. For use against aggressive dogs when walking the neighborhood. My wife has had two "encounters" with two different dogs. She is used to dealing with our German Shepherds, so she managed to get away unharmed. She feels the need to carry something for defense. She is an excellent marks-woman, so I suspect that will translate to the spray.
I asked a similiar question a while back concerning large aggressive dogs and inadaquate containment.
http://forums.equipped.org/ubbthreads.php?ubb=showflat&Number=225825&page=1The consensus was a sturdy walking stick used as a thrusting weapon (try to jam it down killer's throat) or pepper spray. FWIW pepper gel has a much longer claimed range, 18 ft vs 8 ft, then the cone type sprayers. Just expect to dance around the doggie for a couple of seconds before it reaches full affect.